Katsonis-class submarine

Class overview
Name:	Katsonis class
Builders:	Chantiers de la Gironde shipyard Chantiers de la Loire shipyard
Operators:	Hellenic Navy
Preceded by:	Delfin class
Succeeded by:	Protefs class
Built:	1925–1927
In commission:	1927–1945
Completed:	2
Lost:	1
Retired:	1
General characteristics
Type:	Submarine
Displacement:	surfaced: 576 tons; submerged: 775 tons
Length:	62.5 m (205 ft)
Beam:	5.3 m (17 ft)
Draft:	3.6 m (12 ft)
Propulsion:	one two-shaft Schenider-Carels diesel engine; two electric engine motors; 1,300 bhp, 1,000 shp
Speed:	surfaced: 14 kn (26 km/h; 16 mph) submerged: 9.5 kn (17.6 km/h; 10.9 mph)
Range:	3,500 nmi (6,500 km; 4,000 mi) surfaced @ 10 kn (19 km/h; 12 mph)
Endurance:	100 nmi (190 km; 120 mi) submerged @ 5 kn (9.3 km/h; 5.8 mph)
Test depth:	260 ft (80 m)
Complement:	30
Armament:	2 × 21-inch (533 mm) internal bow T/T, 2 × 21-inch (533 mm) external bow T/T, 2 × 21-inch (533 mm) external stern T/T; 1 × 100 mm gun, 2 MGs

The Katsonis class was a French-built class of two submarines for the Hellenic Navy, serving from 1927–28 until the Second World War. The ships of the class were the first new submarines acquired by Greece after the First World War.

In general, they were similar to the French Navy's Circé-class submarines, of Schneider-Laubeuf design, but the conning tower was larger in order to accommodate the rotating platform of the 100 mm gun.

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